Microsoft has confirmed that the recent outage that struck a number of its cloud-based services came as a result of a DNS DDoS attack. The outage, which lasted for roughly two hours, was triggered by an “anomalous surge” in DNS queries that came from all over the world and were targeting a set of Azure-hosted domains.

Late last week, Microsoft’s users were unable to access a whole slew of cloud-based services, such as Xbox Live, Microsoft Office, SharePoint Online, Microsoft Intune, Dynamics 365, Microsoft Teams, Skype, Exchange Online, OneDrive, Yammer, Power BI, Power Apps, OneNote, Microsoft Managed Desktop, and Microsoft Streams.



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